| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adv] [been] a significant | 10 |
|
| 2 | have [adv] been a significant | 10 |
|
| 3 | have [adv] [be] a significant | 10 |
|
| 4 | have [adv] be a significant | 10 |
|
| 5 | has [adv] [be] a significant | 9 |
|
